How warpy are FTV 20 foils?

[Star|Scream]

In a perfect fit double-sleeved, can they be distinguished from nonfoils? I'd like to use some in my deck but it contains mostly non-foils.

[Esper3k]

I find that in general with foils, if you store them in a perfect fit sleeve and get them into one before they start warping, you're fine.

Even then, if you double sleeve them when you play them, you should be ok.

[Dan Turner]

I have a playset of FTV Dryad arbors in a deck and there is no way to tell where they are.

[Star|Scream]

I have a playset of FTV Dryad arbors in a deck and there is no way to tell where they are.

thanks

[thecrav]

I'll tell you that they're warpy enough that mine are still sealed and they're already warped.

That being said, they can be flattened out like any other foil.